Pteromalus puparum

Pteromalus puparum, common name white butterfly pupal parasitoid wasp, is a widely distributed species of endoparasitic wasp that oviposits in and parasitizes Lepidoptera cocoons. It is used as a biological control of the white cabbage moth. This wasp parasitizes a number of other species, including at least 11 kinds of swallowtail butterflies.